Drupal Mailchimp and Mandrill Integration

The Drupal integration for Mailchimp makes your email delivery world efficient, and your user's email receipt and control simple and precise. The integration module is actually a suite of modules, each offering a unique feature. The core module provides all of the API integration functionality, and the ability to add your Mailchimp API key and set a few settings. The other features are broken into sub-modules. Now supported in Drupal 8!

Activity: Track Mailchimp activity history for any email address in Drupal.

Lists: Any “fieldable” Drupal Entity with an email address can be connected to any number of Mailchimp Lists, and subscription is controlled by editing the entity. Map token, field, and property values to your Mailchimp merge fields. Allow users to subscribe during registration, or other Entities to be subscribed during creation.

The Mandrill module allows site emails to be sent through the Mandrill transactional email service rather than your webserver. This ensures deliverability, allows for great-looking emails across all email clients, and provides reporting on what emails were sent, whether they were opened, and any links that were clicked.